Commit 05f1d8ed authored by Stefan Haberland's avatar Stefan Haberland Committed by Jens Axboe
Browse files

s390/dasd: fix hanging device after quiesce/resume 



Quiesce and resume are functions that tell the DASD driver to stop/resume
issuing I/Os to a specific DASD.

On resume dasd_schedule_block_bh() is called to kick handling of IO
requests again. This does unfortunately not cover internal requests which
are used for path verification for example.

This could lead to a hanging device when a path event or anything else
that triggers internal requests occurs on a quiesced device.

Fix by also calling dasd_schedule_device_bh() which triggers handling of
internal requests on resume.

Fixes: 8e09f215 ("[S390] dasd: add hyper PAV support to DASD device driver, part 1")

Cc: stable@vger.kernel.org
Signed-off-by: default avatarStefan Haberland <sth@linux.ibm.com>
Reviewed-by: default avatarJan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20230721193647.3889634-2-sth@linux.ibm.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent bb5faa99

drivers/s390/block/dasd_ioctl.c

+1 −0
Original line number Diff line number Diff line
@@ -131,6 +131,7 @@ static int dasd_ioctl_resume(struct dasd_block *block) 
	spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags);



	dasd_schedule_block_bh(block);

	dasd_schedule_device_bh(base);

	return 0;

}